Author(s): Md. Zahurul Islam

Linked Author(s): Md. Zahurul Islam

Keywords: No Keywords

Abstract: In the study an investigation was carried out to ascertain the main causes of failure of the Teesta Left Bank Flood Control Embankment, the Brahmaputra Right Bank Fmbankment and the Dharla Right Bank Embankment and to make some reco mmendations for minimizing embankment failure in the country. For evaluation of soil properties soil samples collected from the failure locations of the above embankments were analyzed at the laboratories of IFCDR and the Department of Civil Engineering, BUET. Top flowlines for failed sections were drawn following the method suggested by A. Cassagrande (Punmia, 1981; Varshney, 1979). Discharges per unit length, seepage forces and hydraulic gradients at the exit points of the coun try side slopes of the embankments were also studied for seepage analyses. Possibility of overtopping failure was assessed from mean daily water level hydrographs and maximum monthly water level hydrographs of the concerned rivers for the nearby stations. Stability analyses for the failure sections of the embankments were computed for both the conditions with seepage and without seepage by the simplified Bishop's method (Bishop, 1955). The study revealed that the causes of failure of the Flood Enbankments in Bangladesh could be attributed to faulty construction below standard specification, improper maintenance and river migration. Based on the analysis of data and information collected, recommendations were made for minimizing embankment failure in the country to protect people's hearth and home.

DOI:

Year: 1993